Rotary folding apparatus



A.FALLOT.

ROTARY FOLDING APPARATUS.

APPUCATION man MAY 1. 1918.

1,413, 41, v Patented Apr. 25, 1922.

ALFRED FALLOT, or rLAUniv, GERMANY, ASSIGNOR rovoe'rrnnmscnn iviascnmnn.

FABBIK (VORM. J, ova H. nrnrn on) acrrnnensnnnsonarr, or PLAUEN, SAXONY,

' GERMANY.

ROTARY FOLDING APPARATUS.

Specification of Iietters Patent. Patented Apr, 25, 1922,

Application filed May 7, 1918. Serial No. 233,160.

(GRANTED UNDER THE PRQTVISIONQ 0F THEACT OF MARCH 3, 192.1, 41 STAT. L, 1313,)

To all whom it may concern.

Be it known thatT, ALFRED FAnLoT, a subject of theKin'g of Prussia,-and residing at Plauen i. Vogtland, Germany, have .invented certain new and, useful Improvements in Rotary Folding Apparatus,jof which the following is a specification.

This invention relates to improvements in rotary printing machines, especially to rotary folding apparatus.

With the ordinary apparatus of this character the sheet is first folded in longitudinal direction before receiving the transverse fold. As a result the sheet to be folded at its closed part is much thicker than at its open part so that the mechanism serving to hold the sheet fast at one side acts with much greater force than at the other side. hen both edges of the sheet differ considerably inthickness it often happens that the thinner part is not held fast at all, or only with very small force, and when the printing machine is running with great speed, the sheets fall down or out at the side where they are thinner.

My invention does away with all these drawbacks.

In the accompanying drawing Fig. 1 in longitudinal section illustrates the side part of a folding roller or cylinder, Fig. 2 being part of section a-b in Fig, 1. Fig. 3 is a longitudinal section of similar construction, and Fig. 4 a cross-section according to line 0(Z of Fig. 3.

i is the folding roller or cylinder of a rotary printing machine which at one or more parts of its circumference is provided with .a longitudinal slot 2 of which one of the inner edges serves aS a folding edge 3; journaled in the front sides of the folding cylinder 1 below the slot 2 is a shaft 4 carrying a lever 5, and this lever is provided with av roller 6 adapted to move in therecess or groove of a fixed cam 7. Rigidly connected to the shaft 4 is a, resilient blade 8 which at its upper edge 8 bears against the folding edge 3 of the cylinder, when the shaft 4 is turned in a certain direction. Also fixed to shaft 4 is a lever 9 carrying a pin 10 which presses against a double-armed lever 11 and oscillates the latter when the folding blade is opened. The lever 11 also is arranged on shaft 4, but not rigidly connected therewith,

.ment of the shaft. Pivoted to-one'end of the lever 11 is a rod 12 controlled by a spring 13, the other end of lever 11 ending. inia finger 11' adapted to be pressed against the folding edge 3 when required.

In the construction shown in Figs. 1 and 2 the rod 12 is guided in .a, bore 14 penetrating the cylinder 1.

When the folding blade is to be opened, see Figs. 2 and 4, the lever 5 with its roller 6 oscillates in the direction of the arrow 3/, Fig. 2, by means of the cam 7. As the lever 5 and the folding blade 8 are rigidly connected by means of the shaft 4 the blade 8 must follow the oscillatory motion and move away from the folding edge. At the same time the lever 9 which is fixed to shaft 4 partakesin this movement with its stop. pin 10,, and as the shaft revolves the lever acts against the double-armed: lever 11, against the tension of the spring 13. In consequence thereof, the finger 11- will also move away from the folding edge 3, during which period the spring 13 becomes compressed and will remain so until released by the pin 10. o

' Zhen the roller-lever 5 bymeans of cam 7 receives a motion in the direction of thecally pressing the finger-part 11 against the folding edge 3 and the sheets held fast by means of the blade 8. As the levers 11, ar-

ranged at both sides of the folding cylinder. .are not connected to each other, each of these levers through the spring 13 will adjust itself according to the thickness of the paper between the folding edge.

This isv a very important feature since the.

efiiciency of the folding device is considerably increased thereby; for the roller 6 of the lever 5, contrary to other well .knowni construct ons, may he guided in a camgroove without danger of a breakdown of the folding apparatus when the folding cyl inder is running with great speed.

ra-Jim,

In the modifications shown in Figs. 3 and 4 the spring controlled rod 12 is guided in a'block 15 journaled. in a yoke 16 fixed to the shaft 4i so as to oscillate together with the latter. The spring controlled rod will, therefore, partake in the same oscillation as the parts 5 and 9. Hence contrary to the first construction the spring 13 will maintain its tension until the finger 11 comes into contact with the sheets held fast by the blade 8. The sheets will thus determine the stroke of the finger 11, and according to the thickness of the fold the spring 18 will become more or less compressed. This construction, thus, as compared with. that shown in Figs. .1 and 2, has the great advantage that the spring 13 will be subjected to very little wear since it changes its tension only at the end of the operative stroke of the fingers of the fold. The pin 10 merely serves as a stroke controller when the blade 8 is opened.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent is V 1. In a rotary folding apparatus the combination of a folding cylinder, a shaft journaled therein, a cam having a groove, a roller connected to said shaft adapted to move in said groove and oscillate said shaft, a folding blade rigidly connected to said shaft, a lever fixed thereto, a pin on said lever and a double-armed lever adapted to oscillate independently around said shaft, one arm of said lever forming a folding finger and .a spring actuated means holding said last named lever continuously in contact with the said pin.-

a roller connected to said shaft adapted to move in said groove and oscillate said shaft, a folding blade fixed to sald shaft, a lever thereon, a pin on said lever and a lever formed with a folding finger arranged on said shaft and adapted to oscillate independently of the movement of the shaft and a spring controlled rod pivoted to one end of said lever and holding the latter con- 5O tinuously in contact with said pin.

3. In a rotary folding apparatus the combination of a folding cylinder, a shaft journaled therein, means for actuating said shaft,

a folding blade connected to said shaft, a

being adapted to be pressed together when the folding blade is opened and expanded when the folding blade is closed.

4. In a rotary folding apparatus, the combination of a folding cylinder, a shaft journaled therein, means for actuating said shaft,

a resilient folding blade fixed to said shaft, a folding finger loosely mounted on said shaft besides said folding blade, means for opening said folding finger simultaneously with said folding blade when the shaft is turned in one direction, and spring actuated means to press said folding finger against the folding edge independently from said folding blade when said shaft is turned in the other direction.

In testimony whereof I have affixed my signature 1n presence of two wltnesses.

ALFRED FALLOT Witnesses GoT'rwAL'r SIEBER, JOSEPH 

